A simple implementation of the Dutch variant of Blackjack.
- Players place their bets after receiving their first card.
- When the round of bets finishes, players get their next card.
- Players play in turn.
- Players can choose 3 actions:
- Stand: Hold total and stop playing.
- Hit: Ask for a card.
- Split: Choose two identical cards and remove them. The player then places two separate actions.
- Players can end their turn in two states:
- Stand: Still playing against the bank with a total.
- Bust: Lost because they have over 21 points.
- After all players end their turn, and there are players standing, the bank must play.
- The bank must hit with a total of 16 points or less.
- The bank must stand with a total of 17 points or more.
- If the bank and player have the same number of points, the bank wins.
- If the bank has more than 21 points, he is bust and all standing players win.
- Points are calculated as follows:
- King is 3 points
- Queen is 2 points
- Jack is 1 point
- Ace is 1 or 11 points of your choice
- Cards 2 to 10 have their normal point value
- The suit of the card is not important
- The Joker does not play
- A total of three players can play with one card deck.
The game is a java application that is packaged into a runnable JAR using maven.
Clone the repository and in the root directory run mvn package.
You will get a runnable JAR created under the target/ folder ending with the prefix jar-with-dependencies.
Run the game using java -jar.
NOTE: Java version 11 is required.
You can optionally start the game by building the docker image and running it using:
docker build -t twentyone:latest . && docker run -it --rm twentyone:latest